Walking away from a long-standing tradition of covering issues and presidential policies during campaign season, the network evening newscasts have all but abandoned that type of reporting this year, according to recent tabulations from Tyndall Report, which for decades has tracked the flagship nightly news programs.

Since the beginning of 2016, ABC’s World News Tonight, CBS Evening News and NBC Nightly News have devoted just 32 minutes to issues coverage, according to Andrew Tyndall.

Differentiating issues coverage from daily campaign coverage where policy topics might be addressed, Tyndall defines issues coverage by a newscast this way: “It takes a public policy, outlines the societal problem that needs to be addressed, describes the candidates' platform positions and proposed solutions, and evaluates their efficacy.”

And here’s how that kind of in-depth coverage breaks down, year to date, by network:

No trade, no healthcare, no climate change, no drugs, no poverty, no guns, no infrastructure, no deficits. To the extent that these issues have been mentioned, it has been on the candidates' terms, not on the networks' initiative.

These numbers are staggering in terms of the complete retreat they represent from issues-orientated campaign coverage. Just eight years ago, the last time both parties nominated new candidates for the White House, the network newscasts devoted 220 minutes to issues coverage, compared to only 32 minutes so far this year. (CBS Evening News went from 119 minutes of issues coverage in 2008 to 16 this year.)

Note that during the Republican primary season alone, the networks spent 333 minutes focusing on Donald Trump. Yet for all of 2016, they have set aside just one-tenth of that for issue reporting.

And look at this: Combined, the three network newscasts have slotted 100 minutes so far this year for reporting on Hillary Clinton’s emails while she served as secretary of state, but just 32 minutes for all issues coverage. (NBC’s Nightly News has spent 31 minutes on the emails this year; just eight minutes on issues.)

Indeed, this approach used to be a hallmark of presidential campaign reporting; outline what candidates stand for, describe what their presidency might look like, and compare and contrast that platform with his or her opponents. i.e. What would the new president’s top priorities be on the first day of his or her new administration?

It seems clear that the media’s abandonment of issues coverage benefits Trump since his campaign has done very little to outline the candidate’s core beliefs. Clinton, by contrast, has done the opposite.

As the Associated Press reported, “Trump’s campaign has posted just seven policy proposals on his website, totaling just over 9,000 words. There are 38 on Clinton’s ‘issues’ page, ranging from efforts to cure Alzheimer’s disease to Wall Street and criminal justice reform, and her campaign boasts that it has now released 65 policy fact sheets, totaling 112,735 words.”

Tyndall’s findings echo what other media researchers have found this campaign season, and what commentators have been noting for months:

It is just stunning how completely and entirely absent policy is from this election except for immigration and (to a certain extent) trade.

A study released last month from Harvard Kennedy School’s Shorenstein Center on Media, Politics and Public Policy confirmed that during the time of both parties’ conventions this summer, just eight percent of news coverage centered on policy and issues.

“During the convention period, even though questions of policy and leadership were on the agenda within the halls of the national conventions, they were not on journalists’ agenda,” wrote Harvard University professor Thomas Patterson. “Polls, projections, strategy and the like constituted about a fifth of all coverage, whereas issues took up less than 1/12 and the candidates’ qualifications for the presidency accounted for less than 1/13.”

Part of the purpose of campaign coverage, including at the flagship network newscasts, is to help inform voters about key issues of public concern. It’s troubling that the networks have decided this year to walk away from that responsibility.